package com.njth.servlet.action;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.Iterator;
import java.util.List;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.njth.beans.Category;
import com.njth.dao.CategoryDAO;
import com.njth.dao.DaoConfig;

public class DeleteCategory extends HttpServlet {

	/**
	 * Constructor of the object.
	 */
	public DeleteCategory() {
		super();
	}

	/**
	 * Destruction of the servlet. <br>
	 */
	public void destroy() {
		super.destroy(); // Just puts "destroy" string in log
		// Put your code here
	}

	/**
	 * The doGet method of the servlet. <br>
	 *
	 * This method is called when a form has its tag value method equals to get.
	 * 
	 * @param request the request send by the client to the server
	 * @param response the response send by the server to the client
	 * @throws ServletException if an error occurred
	 * @throws IOException if an error occurred
	 */
	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		this.doPost(request, response);
	}

	/**
	 * The doPost method of the servlet. <br>
	 *
	 * This method is called when a form has its tag value method equals to post.
	 * 
	 * @param request the request send by the client to the server
	 * @param response the response send by the server to the client
	 * @throws ServletException if an error occurred
	 * @throws IOException if an error occurred
	 */
	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		response.setContentType("text/html");
		response.setCharacterEncoding("utf-8");
		PrintWriter out = response.getWriter();
		
		String id = request.getParameter("deleteId");
		Category category = new Category();
		CategoryDAO categorydao = (CategoryDAO)DaoConfig.getDao(CategoryDAO.class);
		int cid=Integer.parseInt(id);
		if(this.isExist(cid, category)){
		categorydao.delete(Integer.parseInt(id));
			out.write("删除成功！");
			out.write("即将跳往指定页面！");
			//产品删除成功，跳到指定页面！
			response.sendRedirect(request.getContextPath()+"/com/njth/jsp/deleteCategory.jsp");
			out.close();
			out.flush();
		}else{
			out.write("操作失误，请重试！");
		}
		
		out.close();
		out.flush();
		
		}
	private boolean isExist(int id,Category category){
		CategoryDAO categorydao = (CategoryDAO)DaoConfig.getDao(CategoryDAO.class);
		Category  ct=(Category)categorydao.getCategory(id);
				if(ct!=null){
					 return true;
			   }
					return false;
	}

	/**
	 * Initialization of the servlet. <br>
	 *
	 * @throws ServletException if an error occurs
	 */
	public void init() throws ServletException {
		// Put your code here
	}

}
